Switch



Sept. s, 1925. 1,552,561

E. H. JACOBS SWITCH Filed May 6, 1921 2 Shoots-Sheet 1 Patented Sept. 8, 1925.

UNITED STATES PATENT OFFICE.

ERNEST H. JACOBS, OF CHICAGO, ILLINOIS, ASSIGNOR TO ELECTRICAL ENGINEERS EQUIPMENT COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SWITCH.

Application filed May 6,

To all whom it may concern:

Be it known that I, ERNEST H. JAooBs, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Switches, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to switches, and is especially useful in connection with the large disconnecting or air break switches employed in the distribution of power at high voltages.

One object of my invention is to provide a combined locking and manipulation device for such switches, which will operate efficiently on long switches, as well as short ones. It is for this reason that the invention is particularly useful in high voltage work because the switches for such work must necessarily be of relatively great lengths.

On account of the lengths of these switches employed for this work, dilferences inthermal expansivity, as well as inadequate rigidity of the supporting elements upon which the switch and the contacts therefor are mounted, will often result in relatively large shifting movement between the contact fingers and the switch blades, longitudinally of the blades.

Another object of my invention is to provide locking means for switches which will not be rendered inoperative or thrown out of adjustment by any normal displacement of the blades with respect to the contact fingers longitudinally of the blades. Another object of my invention is to provide locking means comprising a minimum number of relatively simple parts, cheap to manufacture, easy to assemble and durable in service.

Another object is to devise such a locking means, capable of being embodied in switches of well known standard type of design.

Further objects and advantages of my invention will be apparent'as the description proceeds.

In the accompanying drawings:

Figure 1 is a top plan view of part of a disconnecting switch illustrating the application thereto of locking means according to my invention;

1921. Serial No. 467,260.

Figure 3 is a section on the line 3-3 of Figure 2;

Figure 4 is a section on line 4-4 of Figure 5,'showing an embodiment of my invention employing only a single pivoted member;

Figure 5 is a side view of the same device;

and

Figure 6 is a detail section on line 6-6 of Figure 4. p

In the embodiment of my invention illustrated in Figures 1, 2 and 3, I have illustrated duplicate locking elements pivoted for movement in a plane normal to the switch blade, and stationary means adapted to be engaged by said elements to lock the switch in closed position. Referring to Figure 1 the switch blade 10 is enlarged by a sheath 11 where it engages the resilient contact elements 13, projecting from block 12 mounted on a support 14 to which one cable is suitably connected. The free end of the switch blade enters between guide shoes 16 which bring the blade into correct alignment before it touches elements 13. Projecting from support 14 and preferably integral with shoes 16 and the support is provided a bar 18 extending past guide shoes 16 a sufficient distance to allow for all ordinary longitudinal displacement of the blade 10 with respect to the support. This bar is preferably of irregular cross-section to increase the strength and rigidity thereof.

The improved locking means illustrated comprises duplicate locking members 20 pivoted on opposite sides of the blade 10 by means of supporting clips 22 and pintles 24. The locking members '20 terminate at'their upper ends in hooks 26 and are normally held in the position illustrated by a. spring 28. The lower portions of the locking members 2O cross each other and are then bent v back to form inclined portions 30' terminatclined portions 30 and that a pulling force will engage these portions and force them apart until the pins 32 come into Contact.

.coinbination, a switch blade, and a pulling eye carried by said blade and permanently lying in a plane substantially normal thereto.

9. In a device of the class described, in combination, a switch blade, a pulling eye on said blade lying in aplane normal thereto, and means movable in the plane of said eye for locking said blade in closed position.

10. In a device of the class described, in combination, a switch blade, and duplicate locking elements pivoted on said blade, the free ends of said elements cooperating to form an eye for a pulling hook for opening and closing said switch.

11. In combination, a pivoted switch blade, a free contact, a hinged contact, a stationary catch member extending from =1 said free contact towards the hinged contact, a co-operating latch element pivoted on the blade on an axis parallel to the longitudinal axis of the blade.

12. In combination, a pivoted switch blade, a free contact member co-operating therewith, a stationary detent member extending from said free contact member and lying substantially parallel to the switch blade when it is in the closed position, and a movable latch member pivoted on the blade and co-operating with the detent member, said latch member swinging in a plane substantially at right angles to the axis of the switch blade.

13. In a switch, a movable blade, a stationary locking bar extending along the blade when the same is closed, a detent pivoted on the blade to swing laterally into and out of engagement with the bar, and guiding means for the end of the blade, said guiding means taking up the lateral re-action of the detent.

14. In a switch, a movable blade, a spring contact for engaging the blade, a stationary locking bar extending along the blade when the same is closed, a detent pivoted on the blade to swing laterally into and out of engagement with the bar, and rigid guiding means for the end of the blade, said guiding means taking up the lateral reaction of the detent, and extending beyond the spring contact.

In witness whereof, I hereunto subscribe my name this 30th day of April, 1921.

ERNEST H. JACOBS. 

